marked dependency causes problems with skypack

...and maybe other CDNs or build setups.

basically marked seems to result in this from skypack:

> Failed to load node_modules/marked/bin/marked.js
> Unexpected token (1:0) in marked/bin/marked.js

which makes little sense since it has no reason to try import the `bin` file. marked correctly points the main file (and via export maps) to their ESM bundle.